package pers.mobian.myblog.controller.admin;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import pers.mobian.myblog.pojo.Tag;
import pers.mobian.myblog.service.TagService;

import javax.validation.Valid;


@Controller
@RequestMapping("/admin")
public class TagController {
    @Autowired
    private TagService tagService;

    @GetMapping("/tags")
    //使用倒序的方式，，每一页的大小为10，
    public String tag(@PageableDefault(size = 10, sort = {"id"}, direction = Sort.Direction.DESC)
                               Pageable pageable, Model model) {
        model.addAttribute("page", tagService.listTag(pageable));
        return "admin/tags";
    }


    @GetMapping("/tags/input")
    public String input(Model model) {
        model.addAttribute("tag", new Tag());
        return "admin/tags-input";
    }


    @GetMapping("/tags/{id}/input")
    public String editInput(@PathVariable Long id, Model model) {
        model.addAttribute("tag", tagService.getTag(id));
        return "admin/tags-input";
    }


    @PostMapping("/tags")
    public String post(@Valid Tag tag, BindingResult result, RedirectAttributes attributes) {

        //判断重复分类的方法
        Tag tag1 = tagService.getTagByName(tag.getName());
        if (tag1 != null) {
            //前面的name和需要与pojo类中的成员变量保持一致
            result.rejectValue("name", "nameError", "请不要添加以有标签");
        }


        if (result.hasErrors()) {
            return "admin/tags-input";
        }

        Tag t = tagService.saveTag(tag);
        if (t == null) {
            //
            attributes.addFlashAttribute("message", "新增标签失败");
        } else {
            //
            attributes.addFlashAttribute("message", "新增标签成功");
        }
        return "redirect:/admin/tags";
    }


    //更新的方法
    @PostMapping("/tags/{id}")
    public String editPost(@Valid Tag tag, BindingResult result, @PathVariable Long id, RedirectAttributes attributes) {

        //判断重复分类的方法
        Tag tag1 = tagService.getTagByName(tag.getName());
        if (tag1 != null) {
            //前面的name和需要与pojo类中的成员变量保持一致
            result.rejectValue("name", "nameError", "请不要添加以有标签");
        }


        if (result.hasErrors()) {
            return "admin/tags-input";
        }

        Tag t = tagService.updateTag(id, tag);
        if (t == null) {
            attributes.addFlashAttribute("message", "更新标签失败");
        } else {
            attributes.addFlashAttribute("message", "更新标签成功");
        }
        return "redirect:/admin/tags";
    }

    @GetMapping("/tags/{id}/delete")
    public String delete(@PathVariable Long id, RedirectAttributes attributes) {
        tagService.deleteTag(id);
        attributes.addFlashAttribute("message", "删除标签成功");
        return "redirect:/admin/tags";
    }
}
